99% of the time when battle.net accounts are hacked, it's from keyloggers on internet sites that revolve around the game. They even sell keyfobs with one time c

99% of the time when battle.net accounts are hacked, it's from keyloggers on internet sites that revolve around the game. They even sell keyfobs with one time codes (I got one with SC2 that also works for Diablo), that help greatly with this problem.